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A quest for long-distance signals: The epidermis as central regulator of pipecolic acid-associated systemic acquired resistance.

J. Exp. Bot. 72, 2266-2268 (2021)
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AGD2-like DEFENSE RESPONSE PROTEIN 1 (ALD1) is an aminotransferase that is necessary for the biosynthesis of the immune-active non-protein amino acid pipecolic acid (Pip). Pip and its N-hydroxylated derivative, N-hydroxy-Pip (NHP), have been suggested as possible long-distance signals moving in plants from infected to systemic, uninfected sites to enhance immunity. Jiang et al. (2021) show that accumulation of ALD1 in epidermal chloroplasts at local, infected sites promotes systemic immunity. Their results highlight the epidermis as a site of active immune signaling and ALD1 as an important upstream regulator of long-distance signal transmission in systemic acquired resistance (SAR).
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Publication type Article: Journal article
Document type Letter to the Editor
Keywords Ald1 ; Pipecolic Acid ; Plant Immunity ; Systemic Acquired Resistance; Biosynthesis
ISSN (print) / ISBN 0022-0957
e-ISSN 1460-2431
Quellenangaben Volume: 72, Issue: 7, Pages: 2266-2268 Article Number: , Supplement: ,
Publisher Oxford University Press
Publishing Place Great Clarendon St, Oxford Ox2 6dp, England
Reviewing status Peer reviewed